Bump release number to 7.4

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk@5339 4ea69e1a-61f1-4043-bf83-b5c94c648137

smartmontools/configure.ac

@@ -3,7 +3,7 @@
 #
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ([2.60])
-AC_INIT([smartmontools],[7.3],[smartmontools-support@listi.jpberlin.de])
+AC_INIT([smartmontools],[7.4],[smartmontools-support@listi.jpberlin.de])
 AM_INIT_AUTOMAKE([1.10 foreign])
 
 # Version of drive database branch